Lin Thurber CVM
The Lin Thurber et al (2010) CVM is seismic velocity models of the California crust and uppermost mantle using a regional-scale double-difference tomography algorithm. The details are described in:
- Lin, G., C. H. Thurber, H. Zhang, E. Hauksson, P. Shearer, F. Waldhauser, T. M. Brocher, and J. Hardebeck (2010), A California statewide three-dimensional seismic velocity model from both absolute and differential Times, Bull. Seism. Soc. Am., 100, in press.
These preliminary maps are based on querying the model at an elevation offset of -1000.0m from MSL. We will need to add a DEM to UCVM in order to properly query this model by depth. The model is referenced using inverse bilinear interpolation of the original model boundaries.
As seen in the plots, the Vp model is higher resolution (~10km) than the Vs Model (~30km).
Original Model Format
Recently, we determined the seismic velocity model of the California crust and uppermost mantle using a regional-scale double-difference tomography algorithm. Our model is the first 3D seismic velocity model for the entire state of California based on local and regional arrival time data that has ever been developed. It has improved areal coverage compared to the previous northern and southern California models, and extends to greater depth due to the inclusion of substantial data at large epicentral distances.
Recently, we have configured a program so that this Lin model can be queried through the UCVM API. the original model format is a table of data values in the following format.
FILE FORMAT DESCRIPTION -117.7230 37.8242 1.00 250.00 0.00 5.0390 109.13 lon lat dep x y vp DWS (derivative weight sum)
 Map views of the P-wave velocity model at 1 and 4 km depth slices. Pink dots represent relocated earthquakes. Black lines denote coast line and lakes, gray lines rivers and surface traces of mapped faults. The white contours enclose the areas where the derivative weight sum is greater than 50 (Image Credit: Guoqing Lin |
